Vatersay (Scottish Gaelic: Bhatarsaigh) is an inhabited island in the Outer Hebrides of Scotland. Vatersay is also the name of the only village on the island.
The westernmost permanently inhabited place in Scotland, Vatersay is linked to Barra by a causeway completed in 1991. At low tide, the island is also linked to the islet of Uineasan to the east.